KR960014333B1 - Sludge treating apparatus by rotating - Google Patents

Abstract

a water introduction device for guiding the suspension containing solid materials into a sediment tub; a depositing device for depositing the huge particles and the particle precipitated in waste water into the bottom of the tub; a division device having a plurality of partitions for depositing and separating the particles that are not removed through the depositing device; and a discharge device for discharging clean water.

Description

Multilayer Thin Film Precipitation Tank

1 is a view showing the overall schematic diagram of a multilayer thin film settling tank of one embodiment of the present invention.

FIG. 2 is a partial detail view of the suspension inlet pipe in the multilayer thin film settling tank shown in FIG.

3 is a view showing the first embodiment of the thin plate having the slurry guide member of the present invention.

4 is a view showing a second embodiment of a thin plate having a slurry guide member of the present invention.

5 is a view showing a third embodiment of the thin plate having the slurry guide member of the present invention.

* Explanation of symbols for main parts of the drawings

1: acquisition pipe 2: sheet

3: discharge weir 4: settling sludge outlet

5: sludge concentration area 61: first flaw

7: J-home 8: slurry guide member

9: flow of solid slurry curtain 10: fixed slurry flow

11 upward flow of inlet suspension 12 induction plate

[Industrial use]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer thin film settler, and more particularly, to a multilayer thin film settler having a simple structure and excellent processing efficiency.

[Private Technology]

Multi-layer thin-walled sedimentation tank is one of continuous sedimentation solid-liquid separation device that continuously removes solid particles from solid suspension, and is widely used in water treatment, water treatment, and sewage treatment in which sedimentary solid particles should be separated from liquid.

In general, such multilayer thin-walled sedimentation tanks are not removed from the primary and secondary sedimentation zones, where the solid-containing suspension enters the sedimentation tank and the large or condensed particles sink to the bottom of the sedimentation tank. It consists of a secondary sedimentation zone for sedimenting and separating fine particles, that is, a separation zone including multilayer plates, and a discharge zone for discharging clean clarified water from which solids have been removed. However, such a conventional multi-layer thin film settling tank has a thin slurry curtain which leaves the flow of the precipitated slurry and the thin plate and moves to the concentration zone in contact with the flow of the inlet suspension, whereby the fine particles which must exit the sludge outlet are again accompanied by the inlet suspension. There is a problem that the treatment efficiency is lowered, such as flowing into the separation zone.

In addition, US Patent No. 4,089,782 discloses a technique for introducing an auxiliary thin plate between the existing multi-layer thin plate. In addition, multi-stage sedimentation methods have been developed to further refine the sedimentation zone to extend to the tertiary precipitation basin. However, such sedimentation tanks have a problem in that the apparatus is complicated and the area occupied by the area of the total sedimentation tank is large, which limits the utilization rate of the sedimentation tank.

[Problem to solve the invention]

The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to minimize the volume occupied by the inlet area of the suspension to minimize the decrease in utilization rate of the precipitation area as the area occupied by the inlet area is increased It provides a multi-layer thin-wall sedimentation tank, which minimizes the contact between the flow of slurry and the flow of the inlet suspension deposited on the multi-layer thin film, to allow the fine particles to precipitate and exit the sludge outlet at the bottom. Accompanying is to provide a multi-layer thin plate settling tank that can be prevented from entering the thin film separation area.

[Means for solving the problem]

In order to achieve the object of the present invention as described above, the present invention is an inlet device for introducing a solid-containing suspension into the sedimentation tank, and a sedimentation device for sinking the large particles and condensed particles in the sedimentation tank in the wastewater obtained through the inlet device And a separation device including a plurality of wall plates for sedimenting and separating the fine particles not removed from the precipitation device, and a discharge device for discharging clean clarified water from which solids have been removed through the precipitation device and the fraudulent device. As a multi-layer thin film settling tank, the above-mentioned inlet device allows the suspension to flow in upwardly from the bottom of the multi-layer thin film.

In the present invention, the water inlet device is preferably a tube having a plurality of first flaws for dispersing the suspension from the bottom upwards, the first flaw preferably has a shape selected from round, oval, rectangular. Do. In addition, it is preferable that the tube has the first flaw in the lower part in order to prevent solid precipitate in the tube.

In addition, in the present invention, the thin plate preferably includes a slurry guide member provided perpendicular to the thin plate so that the slurry flowing down the upper portion of the thin plate can be separated from the flow of the suspension flowing through the inlet device, It is preferred that they are crumpled and cut in order to reduce the formation of vortices that may occur due to the shape of the member at the end of the slurry guide member described above. In addition, the slurry guide member is preferably a streamline that can maintain the flow of the laminar flow as much as possible rather than in the form of a square chain.

In addition, the present invention removes the thin plate below the slurry guide member to close the inlet plate to the slurry guide member to avoid contact with the slurry curtain flowing in both sides of the slurry guide member even if the suspension is more widespread dispersion.

[Action]

The present invention minimizes the decrease in utilization rate of the precipitation zone due to the area occupied by the area obtained by minimizing the volume occupied by the acquisition area by searching the device for collecting the suspension solution in the bottom of the multilayer plate in the multi-layer thin film settling tank, and providing a slurry guide member on the thin plate. By minimizing the contact between the flow of slurries and the sedimentation liquor that has been deposited on the multi-layered sheet as much as possible, the fine particles to be precipitated and exited to the sludge outlet at the bottom are prevented from entering the thin-film separation zone again with the inlet suspension. do.

EXAMPLE

Hereinafter, preferred examples and comparative examples of the present invention are described. However, the following examples are only preferred embodiments of the present invention to aid in understanding the present invention, and the present invention is not limited to the following examples.

1 shows a multilayer thin film settling tank which is an embodiment of the present invention. The multi-layered plate settling tank of FIG. 1 has an inlet pipe (1) installed in an inlet zone in which a suspension containing solids flows into the sedimentation tank, and a primary precipitation zone in which large particles or condensed particles sink in the sedimentation tank bottom. The discharge ware (3) provided in the separation zone including a plurality of thin plates (2) in the secondary precipitation zone for sedimentation and separation of the fine particles not removed in the precipitation zone and the discharge zone for discharging clean clean water from which solids have been removed. consist of. A sludge concentration zone 5 for concentrating sludge and a sludge discharge port 4 for discharging the sludge are provided. This multi-layer thin film settling tank as shown in FIG. 2 is provided with a plurality of first flaws (6) in the upper part of the inlet pipe in order to inject the suspension inlet to the top to inject the influent. These first flaws can be a flaw of any shape among circular, elliptical and rectangular.

In addition, the inlet pipe 1 is provided with one or more elongated Jay flaws 8 at the bottom of the pipe to prevent the precipitation of solids when the flow rate decreases.

In addition, the multi-layer thin film settling tank of the present invention has a solid slurry stream (10) moving from the settling slurry and the thin plate to the concentration zone in contact with the flow of the inlet suspension, and the fine particles to be discharged to the sludge outlet again flow into the inlet suspension. A slurry guide member 8 as shown in FIG. 3 is installed perpendicularly to the sheet to prevent entrainment from entering the thin plate separation zone, i.e., to separate the flow of precipitated slurry and the incoming fluid. These slurry guide members can use the thing normally made of iron piece, and it is more preferable to use a streamlined thing.

Such a slurry guide member 8 is attached to the thin plate at a right angle in a wedge shape to guide the slurry coming down the wall plate to both sides of the slurry guide member 8. The inflow water 11 flowing through the inlet pipe 1 from the bottom of the slurry guide member 8 passes upward between the adjacent back of the thin plate and the slurry guide member, so that the slurry is divided into both sides of the iron piece. Contact is avoided. By providing the slurry guide member 8 in this way, the processing performance of the multilayer thin film settling tank is greatly improved. However, such a slurry guide member 8 is a piece of the suspended suspension dispersed due to the distance difference between the inlet pipe 1 and the slurry guide member 8 when the suspension is widely dispersed according to the characteristics of the suspension to be treated and the flow rate of the treatment. The slurry curtain 9 comes into contact with the slurry curtain 9 separated from both sides, so that the slurry curtain 9 may be broken, thereby causing fine particles to float, thereby lowering the precipitation efficiency. In order to prevent such a crack of the slurry curtain 9, the thin plate at the lower part of the square slurry guide member as shown in FIG. 4 is cut out, and the water inlet pipe 1 is brought close to the slurry guide member 8 to prevent dispersion. Even if it becomes wider, the slurry can be narrowed to make the width of the dispersion smaller so that contact with the sludge 10 which flows into the both ends of the slurry guide member 8 can be avoided.

On the other hand, when the treatment flow rate increases and the flow velocity of the fluid flowing upward through the end of the slurry guide member 8 increases, a vortex due to the shape of the slurry guide member 8 is formed, so that the flow of laminar flow in the channel between the multilayer thin plates. This cracking phenomenon occurs and no effective precipitation efficiency can be obtained. In order to prevent the formation of such vortices and to direct the flow of fluid leaving the sludge guide member 8 into laminar flow, the free end, which is not attached to the thin plate of the slurry guide member 8, is raised as shown in FIG. Fold in the direction can provide a guide plate 12 to guide the flow of influent smoothly. In this case, the guide plate may be provided integrally with the slurry guide member or as a separate member.

[effect]

The above-described multilayered thin film of the present invention provides a small investment cost in a small space in the process of removing solid matter and concentration in the process of high concentration fermentation in fermentation industry as well as in the production process such as separation of gluten from corn steep liquor as well as in actual water treatment and sewage treatment. It is a device that can be easily applied.

Claims (9)

An inlet device for introducing a suspension containing solids into the settling tank; A precipitation device for sinking the large particles and the condensation particles in the sedimentation tank bottom in the wastewater obtained through the acquisition device; A separator including a plurality of wall plates for sedimenting and separating the fine particles not removed from the precipitation device; A discharge device for discharging clean clarified water from which solids are removed through the precipitation device and the separation device; A multilayer thin film settling tank comprising the above, the above-mentioned obtaining device is provided so that the suspension is introduced into the suspension dispersed from the bottom upward. The multi-layer thin film settling tank according to claim 1, wherein the inlet device is a tube having a plurality of first flaws for dispersing and injecting the suspension upwardly from the bottom. The multilayer thin film settling tank according to claim 2, wherein the first flaw is a flaw of a shape selected from a circle, an ellipse, and a rectangle. 3. The multilayer thin film settling tank according to claim 2, wherein the tube has at least one Jay flaw at the bottom to prevent the precipitation of solids in the tube. According to claim 1, wherein the thin plate is characterized in that it comprises a slurry guide member which is upright perpendicular to the thin plate to separate the slurry flowing down the top of the thin plate with the flow of the suspension flowing through the inlet device Multi-layer thin film precipitation tank. The multilayer thin film settling tank according to claim 5, wherein the slurry guide member is a square piece of iron piece. The multilayer thin film settling tank according to claim 5, wherein the slurry guide member is streamlined. The multilayer thin film settling tank according to claim 5, wherein the slurry guide member further comprises a guide plate installed upwardly at the free end of the iron piece so as to suppress the formation of the vortex. The multilayer thin film precipitation tank according to claim 5, wherein the thin plate at the bottom of the slurry guide member is removed.